Estimation Flashcards
1
Q
What Categories do you need to estimate
A
1) throughput (QPS for read and write queries
2) latency for read and write queries
3) read/write ratio
4) traffic estimation
- write (QPS, volume of data)
- read (QPS, volume of data)
5) storage estimations
6) memory estimations
- if we use a cache, how are we caching
- how much ram, and how many machines to achieve this
- amount of data you want to store in disk/ssd
2
Q
What is availability
A
the amount of time the system in up in percentages often measured in ‘9s’ Usually 5 9’s is a highly available system.. Availability can be improved with redundancy and failover capability.
